The notion of dispersion, from the Latin word scattered, it has several uses. The first meaning mentioned by the Royal Spanish Academy (RAE) in his dictionary alludes to act and consequence of dispersing: segment and spread what was united, distribute attention, disorganize.
In the field of math, the dispersion refers to how a series of values are statistically distributed. The dispersion is centered on the distance of the different values with respect to the middle value.
When the values they are far from the mean value, the dispersion is marked. On the contrary, if the values are close to the arithmetic mean, there are homogeneity.
This concept is specifically framed within the field of the branch of mathematics called statistics, which focuses on the study of variability, which is caused by paying attention to the laws of probability and starting from a random process. It is also known as propagation measures or variability.
In more specific terms, mathematical dispersion looks at the degree to which a piece is squeezed or stretched. distribution, a concept of probability and statistics that consists of a function that gives the events that are defined on a particular variable the probability that they take place. Three well-known dispersion examples are:
* the standard deviation, also known as typical, a measure used to number the variation of a set of numbers;
* the variance: also called variance, a measure applied on a random variable to determine the expectation of its square of deviation in relation to its mean;
* the interquartile range: also called interquartile, the difference that can be observed in a distribution between the first and third quartiles (each of its parts, once it is divided into four).
According to physical, the dispersion is the decomposition of radiation into its various wavelengths, produced by a propagating medium. The typical example of this phenomenon is the light scattering.
The White light is generated with the combination (overlap) of purple, indigo, blue, green, yellow, Orange Y Red. As it passes through a transparent medium and refracts, scattering takes place and this light it breaks down into different colors.
Scattering develops as light loses speed when it passes through the medium. With slower propagation speed, light is refracted in multiple ways.
The concept of dispersion also refers to the condition of a gas or a solid when, in its mass, it houses another body that is distributed in a uniform way. The fog, to mention one case, implies the dispersion of water in the atmosphere: small drops remain floating in the air.
In the field of biology, on the other hand, we speak of dispersion to refer to the movement of plants, animals, bacteria, fungi and other individuals from the place where they were born to which they choose or correspond to reproduce or between two of reproduction. The first case is known as natal dispersal, while the second, reproductive.
It is also possible to understand this biological concept as the description of the spore and seed movement, among other propagules, a kind of germ or part of an organism that is produced in a sexual or asexual way so that a new one, identical to the original, emerges.
Environmental pollution also uses this term, in particular to refer to the transport of a substance discharged by human beings to the environmentEither it moves within one environmental compartment or moves to a different one. Scattering, in this case, occurs as a result of various biological, chemical, and physical phenomena.